let str = 'sunyifeng';
let num = NaN;
const syf = {
    shuai: 'haoshuai',
    open: () => 123,
    father: {
        name: 'haha'
    }
};
let a1 = {
    name: 'string',
    age: 11,
    sex: 'nan'
};
let arr1 = [1, 2, 3];
let arr2 = [a1];
let arr3 = [a1];
console.log(a1);
console.log(str);
function abc(a, b) {
    return a + b;
}
let promise1 = new Promise((resolve, reject) => {
    resolve(a1);
    reject(a1);
});
abc(1, 3);
